[MM-53968] Includes mattermost-plugin-api into the mono repo (#24235)

Include https://github.com/mattermost/mattermost-plugin-api into the mono repo

Co-authored-by: Jesse Hallam <jesse.hallam@gmail.com>
Co-authored-by: Michael Kochell <mjkochell@gmail.com>
Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>
Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>
Co-authored-by: Alex Dovenmuehle <alex.dovenmuehle@mattermost.com>
Co-authored-by: Michael Kochell <6913320+mickmister@users.noreply.github.com>
Co-authored-by: Christopher Poile <cpoile@gmail.com>
Co-authored-by: İlker Göktuğ Öztürk <ilkergoktugozturk@gmail.com>
Co-authored-by: Shota Gvinepadze <wineson@gmail.com>
Co-authored-by: Ali Farooq <ali.farooq0@pm.me>
Co-authored-by: Maria A Nunez <maria.nunez@mattermost.com>
Co-authored-by: Daniel Espino García <larkox@gmail.com>
Co-authored-by: Christopher Speller <crspeller@gmail.com>
Co-authored-by: Alex Dovenmuehle <adovenmuehle@gmail.com>
Co-authored-by: Szymon Gibała <szymongib@gmail.com>
Co-authored-by: Lev <1187448+levb@users.noreply.github.com>
Co-authored-by: Jason Frerich <jason.frerich@mattermost.com>
Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>
Co-authored-by: Artur M. Wolff <artur.m.wolff@gmail.com>
Co-authored-by: Madhav Hugar <16546715+madhavhugar@users.noreply.github.com>
Co-authored-by: Joe <security.joe@pm.me>
Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>
Co-authored-by: José Peso <trilopin@users.noreply.github.com>

server/public/pluginapi/experimental/bot/logger/admincclogger/admincc_logger.go

@@ -0,0 +1,97 @@
+package admincclogger
+
+import (
+	"fmt"
+
+	"github.com/mattermost/mattermost/server/public/pluginapi/experimental/bot/logger"
+	"github.com/mattermost/mattermost/server/public/pluginapi/experimental/bot/poster"
+	"github.com/mattermost/mattermost/server/public/pluginapi/experimental/common"
+)
+
+type adminCCLogger struct {
+	logger.Logger
+	dmer           poster.DMer
+	logLevel       logger.LogLevel
+	includeContext bool
+	userIDs        []string
+}
+
+/*
+New promotes the provided logger into a admin cc logger, sending direct messages to all the admin
+ids provided through the dmer provided, about all events below the logLevel. If logVerbose is set,
+it will also send the context.
+
+- l Logger: A logger to promote.
+
+- dmer DMer: A DMer to send the messages to the admins.
+
+- logLevel: The highest type of message to be stored in telemetry.
+
+- includeContext: Whether the log context should be messaged to the admins.
+
+- userIDs: The user IDs of the admins.
+*/
+func New(l logger.Logger, dmer poster.DMer, logLevel logger.LogLevel, includeContext bool, userIDs ...string) logger.Logger {
+	return &adminCCLogger{
+		Logger:         l,
+		dmer:           dmer,
+		logLevel:       logLevel,
+		includeContext: includeContext,
+		userIDs:        userIDs,
+	}
+}
+
+// NewFromAPI creates a adminCCLogger directly from a LogAPI instead of passing a logger.
+func NewFromAPI(api common.LogAPI, dmer poster.DMer, logLevel logger.LogLevel, includeContext bool, userIDs ...string) logger.Logger {
+	return New(logger.New(api), dmer, logLevel, includeContext, userIDs...)
+}
+
+func (l *adminCCLogger) Debugf(format string, args ...interface{}) {
+	l.Logger.Debugf(format, args...)
+	message := fmt.Sprintf(format, args...)
+	if logger.Level(l.logLevel) >= 4 {
+		l.logToAdmins("DEBUG", message)
+	}
+}
+
+func (l *adminCCLogger) Errorf(format string, args ...interface{}) {
+	l.Logger.Errorf(format, args...)
+	message := fmt.Sprintf(format, args...)
+	if logger.Level(l.logLevel) >= 1 {
+		l.logToAdmins("ERROR", message)
+	}
+}
+
+func (l *adminCCLogger) Infof(format string, args ...interface{}) {
+	l.Logger.Infof(format, args...)
+	message := fmt.Sprintf(format, args...)
+	if logger.Level(l.logLevel) >= 3 {
+		l.logToAdmins("INFO", message)
+	}
+}
+
+func (l *adminCCLogger) Warnf(format string, args ...interface{}) {
+	l.Logger.Warnf(format, args...)
+	message := fmt.Sprintf(format, args...)
+	if logger.Level(l.logLevel) >= 2 {
+		l.logToAdmins("WARN", message)
+	}
+}
+
+func (l *adminCCLogger) logToAdmins(level, message string) {
+	context := l.Context()
+	if l.includeContext && len(context) > 0 {
+		message += "\n" + common.JSONBlock(context)
+	}
+	_ = l.dmAdmins("(log " + level + ") " + message)
+}
+
+func (l *adminCCLogger) dmAdmins(format string, args ...interface{}) error {
+	for _, id := range l.userIDs {
+		_, err := l.dmer.DM(id, format, args)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}