Make the 'open in browser' behaviour configurable

[jonsugar]

Once Lambo has finished bootstrapping a new project it automatically opens it in a browser—this behavior should be configurable.

By default, Lambo should NOT open the project in a browser.

Configuring Open In Browser functionality
Add/set the OPEN_BROWSER property in ~/.lambo/config.

# Enable opening in a browser
OPEN_BROWSER=true

# disable opening in a browser (default, can be omitted)
OPEN_BROWSER=false

Upgrading existing installations

# ------------------------------------------------------------------------------
# 14-Aug-2021 11:40 am (auto-generated by Lambo)
# ------------------------------------------------------------------------------
# Lambo has introduced new configuration options. They have been added here with
# sensible defaults; however, you should review them.
# ------------------------------------------------------------------------------

# Configure whether Lambo should open the new project in a browser.
#
# NOTE: Set to true to maintain current behavior.
#
# Possible values:
#   true, 1, "yes" or "on"
#   false (default), 0, "no" or "off"
OPEN_BROWSER=true