Add Make targets for formatting and linting

Add configuration and document usage in README

Entire-Checkpoint: 53425877e242

gopls.json

@@ -0,0 +1,49 @@
+{
+    "gofumpt": true,
+    "codelenses": {
+        "gc_details": false,
+        "generate": true,
+        "regenerate_cgo": true,
+        "run_govulncheck": true,
+        "test": true,
+        "tidy": true,
+        "upgrade_dependency": true,
+        "vendor": true
+    },
+    "hints": {
+        "assignVariableTypes": true,
+        "compositeLiteralFields": true,
+        "compositeLiteralTypes": true,
+        "constantValues": true,
+        "functionTypeParameters": true,
+        "parameterNames": true,
+        "rangeVariableTypes": true
+    },
+    "analyses": {
+        "nilness": true,
+        "unusedparams": true,
+        "unusedwrite": true,
+        "useany": true
+    },
+    "usePlaceholders": true,
+    "completeUnimported": true,
+    "staticcheck": true,
+    "directoryFilters": [
+        "-.git",
+        "-.vscode",
+        "-.idea",
+        "-.vscode-test",
+        "-node_modules",
+        "-web/frontend",
+        "-web/templates",
+        "-var",
+        "-api",
+        "-configs",
+        "-init",
+        "-internal/repository/migrations",
+        "-internal/repository/testdata",
+        "-internal/importer/testdata",
+        "-pkg/archive/testdata"
+    ],
+    "semanticTokens": true
+}