Restore extensions in core (#114921)

* bring back grammar extensions

* fix hygiene

* Revert "pull themes from the marketplace"

This reverts commit 0738f76dac.

extensions/java/.vscodeignore

@@ -0,0 +1,2 @@
+test/**
+cgmanifest.json

extensions/java/cgmanifest.json

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+{
+	"registrations": [
+		{
+			"component": {
+				"type": "git",
+				"git": {
+					"name": "atom/language-java",
+					"repositoryUrl": "https://github.com/atom/language-java",
+					"commitHash": "2bd3e55a72b08e171f811a2445343e2df9d89b71"
+				}
+			},
+			"license": "MIT",
+			"version": "0.32.0"
+		}
+	],
+	"version": 1
+}

extensions/java/language-configuration.json

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+{
+	"comments": {
+		"lineComment": "//",
+		"blockComment": [ "/*", "*/" ]
+	},
+	"brackets": [
+		["{", "}"],
+		["[", "]"],
+		["(", ")"]
+	],
+	"autoClosingPairs": [
+		["{", "}"],
+		["[", "]"],
+		["(", ")"],
+		{ "open": "\"", "close": "\"", "notIn": ["string"] },
+		{ "open": "'", "close": "'", "notIn": ["string"] },
+		{ "open": "/**", "close": " */", "notIn": ["string"] }
+	],
+	"surroundingPairs": [
+		["{", "}"],
+		["[", "]"],
+		["(", ")"],
+		["\"", "\""],
+		["'", "'"],
+		["<", ">"]
+	],
+	"folding": {
+		"markers": {
+			"start": "^\\s*//\\s*(?:(?:#?region\\b)|(?:<editor-fold\\b))",
+			"end": "^\\s*//\\s*(?:(?:#?endregion\\b)|(?:</editor-fold>))"
+		}
+	}
+}

extensions/java/package.json

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+{
+	"name": "java",
+	"displayName": "%displayName%",
+	"description": "%description%",
+	"version": "1.0.0",
+	"publisher": "vscode",
+	"license": "MIT",
+	"engines": { "vscode": "*" },
+	"scripts": {
+		"update-grammar": "node ../../build/npm/update-grammar.js atom/language-java grammars/java.cson ./syntaxes/java.tmLanguage.json"
+	},
+	"contributes": {
+		"languages": [{
+			"id": "java",
+			"extensions": [ ".java", ".jav" ],
+			"aliases": [ "Java", "java" ],
+			"configuration": "./language-configuration.json"
+		}],
+		"grammars": [{
+			"language": "java",
+			"scopeName": "source.java",
+			"path": "./syntaxes/java.tmLanguage.json"
+		}],
+		"snippets": [{
+			"language": "java",
+			"path": "./snippets/java.code-snippets"
+		}]
+	}
+}

extensions/java/package.nls.json

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+{
+	"displayName": "Java Language Basics",
+	"description": "Provides snippets, syntax highlighting, bracket matching and folding in Java files."
+}

extensions/java/snippets/java.code-snippets

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+{
+	"Region Start": {
+		"prefix": "#region",
+		"body": [
+			"//#region"
+		],
+		"description": "Folding Region Start"
+	},
+	"Region End": {
+		"prefix": "#endregion",
+		"body": [
+			"//#endregion"
+		],
+		"description": "Folding Region End"
+	}
+}