Refactor and improve extension support

Add support for APCu on macOS from shivammathur/homebrew-extensions
Improve support for geos to compile on PHP 8.0 and 8.1
Fix pecl setup to avoid unnecessary callbacks
Use GitHub releases for all couchbase versions
Use add_extension_from_source for all custom supported extensions
Remove bintray and use shivammathur/intl-icu releases
Add patch for protobuf for installing from source
Move patches from custom extension scripts to patches directory
Add support to build extension from GitHub and pecl tar archives (Internal API)
Refactor regex in extension.ts
Move add_pecl_extension to common.sh
Refactor remove_extension in darwin.sh
Fix shellcheck warning in darwin.sh
Improve switch_version in linux.sh to accept parameters

src/scripts/common.sh

@@ -145,9 +145,6 @@ configure_php() {
 # Function to configure PECL.
 configure_pecl() {
   if ! [ -e /tmp/pecl_config ]; then
-    if ! command -v pecl >/dev/null || ! command -v pear >/dev/null; then
-      add_pecl >/dev/null 2>&1
-    fi
     for script in pear pecl; do
       sudo "$script" config-set php_ini "${pecl_file:-${ini_file[@]}}"
       sudo "$script" channel-update "$script".php.net
@@ -172,10 +169,30 @@ get_pecl_version() {
 # Function to install PECL extensions and accept default options
 pecl_install() {
   local extension=$1
-  configure_pecl >/dev/null 2>&1
+  add_pecl >/dev/null 2>&1
   yes '' 2>/dev/null | sudo pecl install -f "$extension" >/dev/null 2>&1
 }
 
+# Function to install a specific version of PECL extension.
+add_pecl_extension() {
+  extension=$1
+  pecl_version=$2
+  prefix=$3
+  enable_extension "$extension" "$prefix"
+  if [[ $pecl_version =~ .*(alpha|beta|rc|snapshot|preview).* ]]; then
+    pecl_version=$(get_pecl_version "$extension" "$pecl_version")
+  fi
+  ext_version=$(php -r "echo phpversion('$extension');")
+  if [ "$ext_version" = "$pecl_version" ]; then
+    add_log "${tick:?}" "$extension" "Enabled"
+  else
+    disable_extension "$extension" >/dev/null 2>&1
+    delete_extension "$extension" >/dev/null 2>&1
+    pecl_install "$extension-$pecl_version"
+    add_extension_log "$extension-$pecl_version" "Installed and enabled"
+  fi
+}
+
 # Function to setup pre-release extensions using PECL.
 add_unstable_extension() {
   extension=$1