remove all occurrences of ZLS being called "Zig Language Server"

This is made to avoid ZLS being called "the Zig Language Server" (or "the LSP") which implies ZLS being "official" / developed by the ZSF.
Obviously, ZLS still remains a acronym for "Zig Language Server".

README.md

@@ -1,12 +1,12 @@
-<img src="https://raw.githubusercontent.com/zigtools/zls/master/.github/assets/zls-opt.svg" alt="Zig Language Server" width=200>
+<img src="https://raw.githubusercontent.com/zigtools/zls/master/.github/assets/zls-opt.svg" alt="ZLS Logo" width=200>
 
 [![CI](https://github.com/zigtools/zls/workflows/CI/badge.svg)](https://github.com/zigtools/zls/actions)
 [![codecov](https://codecov.io/github/zigtools/zls/graph/badge.svg?token=WE18MPF00W)](https://codecov.io/github/zigtools/zls)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
 **Need support? Wanna help out? Join our [Discord server](https://discord.gg/5m5U3qpUhk)!**
 
-The Zig Language Server (ZLS) is a tool that implements Microsoft's Language Server Protocol for Zig in Zig. In simpler terms: it'll provide you with completions, go-to definition, [etc.](#features) when you write Zig code!
+ZLS is a non-official implementation of the [Language Server Protocol](https://microsoft.github.io/language-server-protocol/) for [Zig](https://ziglang.org/) in Zig. It provides developers with IDE [features](#features) in their editor.
 
 ## Installation
 

schema.json

@@ -1,7 +1,7 @@
 {
     "$schema": "http://json-schema.org/schema",
     "title": "ZLS Config",
-    "description": "Configuration file for the zig language server (ZLS)",
+    "description": "Configuration file for ZLS",
     "type": "object",
     "properties": {
         "enable_snippets": {

src/main.zig

@@ -10,7 +10,7 @@ const binned_allocator = @import("binned_allocator.zig");
 const log = std.log.scoped(.zls_main);
 
 const usage =
-    \\ZLS - A non-official Zig Language Server
+    \\ZLS - A non-official language server for Zig
     \\
     \\Commands:
     \\  help, --help,             Print this help and exit

src/tools/config_gen.zig

@@ -92,7 +92,7 @@ const Config = struct {
 const Schema = struct {
     @"$schema": []const u8 = "http://json-schema.org/schema",
     title: []const u8 = "ZLS Config",
-    description: []const u8 = "Configuration file for the zig language server (ZLS)",
+    description: []const u8 = "Configuration file for ZLS",
     type: []const u8 = "object",
     properties: std.json.ArrayHashMap(SchemaEntry),
 };