RFR: 8353581: Support for `import module` in JShell's code completion [v3]

[Jan Lahoda]

> Adding support for `import module ` to JShell's code completion.

Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:

  Adjusting behavior for cases like import module ja<tab>;

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24442/files
  - new: https://git.openjdk.org/jdk/pull/24442/files/53dd46b7..a5ba85a8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24442&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24442&range=01-02

  Stats: 51 lines in 2 files changed: 8 ins; 29 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/24442.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24442/head:pull/24442

PR: https://git.openjdk.org/jdk/pull/24442