Bump version to 0.100.0 (#14312)

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# Description
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Bump version to `0.100.0`

# User-Facing Changes

The new release `v0.100.0` is coming...

crates/nu-utils/src/sample_config/default_config.nu

@@ -1,6 +1,6 @@
 # Nushell Config File
 #
-# version = "0.99.2"
+# version = "0.100.0"
 
 # For more information on defining custom themes, see
 # https://www.nushell.sh/book/coloring_and_theming.html

crates/nu-utils/src/sample_config/default_env.nu

@@ -1,6 +1,6 @@
 # Nushell Environment Config File
 #
-# version = "0.99.2"
+# version = "0.100.0"
 
 def create_left_prompt [] {
     let dir = match (do --ignore-shell-errors { $env.PWD | path relative-to $nu.home-path }) {