chore: add api extractor configuration and fix some associated problems (#6388)

* chore: add configuration for api extractor

* fix: remove extra param names

* chore: private to internal

* remove unrestricted

* chore: remove double backticks

* chore: remove fileoverview and export * as

* chore: return to returns

* chore: fix backslashes and angle brackets in tsdoc

* chore: final to sealed

* chore: ignore to internal

* chore: fix link tags

* chore: add api-extractor configuration

* chore: add unrecognized tag names

* chore: remove tsdoc-metadata

* fix: correct index.d.ts

* chore: fix connection link

core/field.ts

@@ -280,7 +280,7 @@ export abstract class Field implements IASTNodeLocationSvg,
    * Initialize everything to render this field. Override
    * methods initModel and initView rather than this method.
    *
-   * @final
+   * @sealed
    * @internal
    */
   init() {
@@ -662,7 +662,7 @@ export abstract class Field implements IASTNodeLocationSvg,
    *
    * @param opt_e Optional mouse event that triggered the field to open, or
    *     undefined if triggered programmatically.
-   * @final
+   * @sealed
    * @internal
    */
   showEditor(opt_e?: Event) {
@@ -833,7 +833,7 @@ export abstract class Field implements IASTNodeLocationSvg,
 
   /**
    * Get the text from this field to display on the block. May differ from
-   * ``getText`` due to ellipsis, and other formatting.
+   * `getText` due to ellipsis, and other formatting.
    *
    * @returns Text to display.
    */
@@ -862,7 +862,7 @@ export abstract class Field implements IASTNodeLocationSvg,
    * value to a string.
    *
    * @returns Current text.
-   * @final
+   * @sealed
    */
   getText(): string {
     // this.getText_ was intended so that devs don't have to remember to call
@@ -924,7 +924,7 @@ export abstract class Field implements IASTNodeLocationSvg,
    * than this method.
    *
    * @param newValue New value.
-   * @final
+   * @sealed
    */
   setValue(newValue: AnyDuringMigration) {
     const doLogging = false;