Framework: Rewrite nodejs.mk and reorganize www/{node,npm,yarn}

The current USES=nodejs has the following issues:
- www/node is not the default version while www/node16 is.
- It also means inconsistent naming of node ports.
- www/npm duplicates with www/npm-node16.
- www/yarn duplicates with www/yarn-node16.

The notable changes are introduced to fix the above issues:
- Rewrite Mk/Uses/nodejs.mk.
- Add new LTS version of nodejs (www/noe18).
- Add new current version of nodejs (www/node19).
- Change default nodejs version from 16 to 18 (latest LTS).
- Use consistent naming for all supported node versions.
- Convert www/node, www/npm and www/yarn to meta ports.

After this commit:
- All supported node versions are named as node{14,16,18,19}
- www/node is a meta port which depends on the default version (e.g. www/node18)
- www/npm is a meta port which depends on the default version (e.g. www/npm-node18)
- www/yarn is a meta port which depends on the default version (e.g. www/yarn-node18)
- Bump PORTREVISION of dependent ports for dependency change (from www/node16 to www/node18)

Discussed with:	jrm, otis, pizzamig

1 files changed, 11 insertions, 0 deletions

diff --git a/www/node18/files/patch-src_cares__wrap.h b/www/node18/files/patch-src_cares__wrap.h
new file mode 100644
index 000000000000..7f57f6d8b333
--- /dev/null
+++ b/www/node18/files/patch-src_cares__wrap.h
@@ -0,0 +1,11 @@
+--- src/cares_wrap.h.orig	2021-08-18 22:13:12 UTC
++++ src/cares_wrap.h
+@@ -22,7 +22,7 @@
+ # include <netdb.h>
+ #endif  // __POSIX__
+ 
+-# include <ares_nameser.h>
++# include <arpa/nameser.h>
+ 
+ namespace node {
+ namespace cares_wrap {