Updated API Code Samples (#24141)

* api: remove PHP code samples

* api: remove Curl code samples

* api: remove Go code samples

* link out to marketplace exclusively for community-built drivers

* absolute path to V4_SRC

* programmatically extract x-codeSamples

* initial batch of examples

* Update api/server/main.go

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

* Update api/server/main.go

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

* Update api/server/main.go

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

* updated examples

---------

Co-authored-by: Alejandro García Montoro <alejandro.garciamontoro@gmail.com>

api/Makefile

@@ -1,9 +1,11 @@
+ROOT := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+
 .PHONY: build build-v4 clean playbooks
 
-V4_YAML = v4/html/static/mattermost-openapi-v4.yaml
+V4_YAML = $(ROOT)/v4/html/static/mattermost-openapi-v4.yaml
 
-V4_SRC = v4/source
-PLAYBOOKS_SRC = playbooks
+V4_SRC = $(ROOT)/v4/source
+PLAYBOOKS_SRC = $(ROOT)/playbooks
 
 build: build-v4
 
@@ -50,6 +52,8 @@ build-v4: node_modules playbooks
 	@cat $(V4_SRC)/exports.yaml >> $(V4_YAML)
 	@if [ -r $(PLAYBOOKS_SRC)/paths.yaml ]; then cat $(PLAYBOOKS_SRC)/paths.yaml >> $(V4_YAML); fi
 	@if [ -r $(PLAYBOOKS_SRC)/merged-definitions.yaml ]; then cat $(PLAYBOOKS_SRC)/merged-definitions.yaml >> $(V4_YAML); else cat $(V4_SRC)/definitions.yaml >> $(V4_YAML); fi
+	@echo Extracting code samples
+	cd server && go run . $(V4_YAML)
 
 	@node_modules/.bin/swagger-cli validate $(V4_YAML)
 	@node_modules/.bin/redoc-cli -t ./v4/html/ssr_template.hbs build ./v4/html/static/mattermost-openapi-v4.yaml -o ./v4/html/index.html --options.noAutoAuth  --options.suppressWarnings
@@ -74,5 +78,5 @@ clean:
 playbooks:
 	@echo Fetching Playbooks OpenAPI spec
 	cd playbooks && node extract.js
-	cd playbooks && node merge-definitions.js ../$(V4_SRC)/definitions.yaml
-	cd playbooks && node merge-tags.js ../$(V4_SRC)/introduction.yaml
+	cd playbooks && node merge-definitions.js $(V4_SRC)/definitions.yaml
+	cd playbooks && node merge-tags.js $(V4_SRC)/introduction.yaml