fix(tomcat): keep the web app's META-INF/context.xml in the generated descriptor

Tomcat ignores an app's META-INF/context.xml once conf/Catalina/localhost
has a descriptor for it, and the run configuration always wrote a bare
<Context docBase reloadable/>. Resources, environment entries, valves and
realms declared by the app were lost, so JNDI lookups failed at runtime.

The descriptor now starts from the app's own context.xml (exploded
directory or WAR, for all three deployment kinds) with docBase and
reloadable set by the IDE and path dropped. An unreadable file or one
whose root is not <Context> falls back to the bare descriptor.

src/platform/colorScheme.test.ts

@@ -14,22 +14,6 @@ describe("color schemes", () => {
     expect(schemeTokens("light").get("--bg-editor")).not.toMatch(/var\(/);
   });
 
-  it("gives PHP variables and function calls their own colours, as PhpStorm (#1532)", () => {
-    expect(schemeTokens("dark").get("--syn-php-variable")).toBe("#c77dbb");
-    expect(schemeTokens("dark").get("--syn-php-function-call")).toBe("#56a8f5");
-    expect(schemeTokens("light").get("--syn-php-variable")).toBe("#871094");
-    expect(schemeTokens("light").get("--syn-php-function-call")).toBe("#00627a");
-    const css = readFileSync("src/styles/tokens.css", "utf8");
-    expect(css).toMatch(/\.cm-editor\[data-language="PHP"\] \{\s*--syn-variable: var\(--syn-php-variable\);/);
-    // An imported PHP_VAR still wins: language overrides are emitted for the same element, !important.
-    const imported = schemeCss(
-      "theme-default",
-      { dark: { "php.identifier": { foreground: "#48d8ee" } } },
-      document.documentElement,
-    );
-    expect(imported).toMatch(/\.cm-editor\[data-language="PHP"\] \{\n {2}--syn-variable: #48d8ee !important;/);
-  });
-
   it("emits scheme and override declarations", () => {
     const root = document.documentElement;
     root.dataset.theme = "light";

src/styles/tokens.css

@@ -132,9 +132,6 @@ html {
   --syn-python-constant: var(--syn-constant);
   --syn-python-property: var(--syn-property);
   --syn-python-type-parameter: var(--syn-type);
-  /* PhpStorm colours PHP variables and function calls on their own */
-  --syn-php-variable: var(--syn-property);
-  --syn-php-function-call: var(--syn-function);
   --syn-builtin: #8888c6;
   --syn-self: #94558d;
   --syn-keyword-arg: #aa4926;
@@ -526,8 +523,6 @@ html {
   --syn-python-constant: var(--syn-constant);
   --syn-python-property: var(--syn-property);
   --syn-python-type-parameter: var(--syn-type);
-  --syn-php-variable: var(--syn-property);
-  --syn-php-function-call: var(--syn-function);
   --syn-builtin: #000080;
   --syn-self: #94558d;
   --syn-keyword-arg: #660099;
@@ -794,8 +789,6 @@ html {
   --syn-python-constant: var(--syn-constant);
   --syn-python-property: var(--syn-property);
   --syn-python-type-parameter: var(--syn-type);
-  --syn-php-variable: var(--syn-property);
-  --syn-php-function-call: var(--syn-function);
   --syn-builtin: #b0b0f0;
   --syn-self: #d08ac8;
   --syn-keyword-arg: #e0805c;
@@ -1147,8 +1140,6 @@ html {
   --syn-python-constant: var(--syn-constant);
   --syn-python-property: var(--syn-property);
   --syn-python-type-parameter: var(--syn-type);
-  --syn-php-variable: var(--syn-property);
-  --syn-php-function-call: var(--syn-function);
   --syn-builtin: var(--palette-cyan);
   --syn-self: var(--palette-red);
   --syn-keyword-arg: var(--palette-red);
@@ -1438,8 +1429,3 @@ html {
   --db-connected: var(--success);
   --db-connected-ring: var(--success);
 }
-/* PHP editors: variables and function calls use the PHP colours (PHP_VAR / PHP_FUNCTION_CALL). */
-.cm-editor[data-language="PHP"] {
-  --syn-variable: var(--syn-php-variable);
-  --syn-function-call: var(--syn-php-function-call);
-}